2026 NPPES data Optometrist NPI 1275520975 O.D.
Verify on CMS →

THOMAS NADEAU, O.D.

Optometrist in BOOTHBAY HARBOR, Maine. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
228
Medicare Part D claims · 62 beneficiaries · Optometrist avg: 257
Generic prescribing
68%
generic claims · 32% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

THOMAS NADEAU, O.D. filed 228 Medicare Part D claims in 2023 as a Optometrist in BOOTHBAY HARBOR, Maine, prescribing 68% generic.

228
Part D claims, 2023
68%
generic prescribing

Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) — no proprietary rating or editorial opinion is applied.

THOMAS NADEAU, O.D.'s Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

228 49th percentile higher than 49% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). This entry sits in this band. 400–600: 90,619 prescribers (7%). Above this entry. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source CMS Medicare Part D Prescriber Public Use File · 2023

What does the federal data show about THOMAS NADEAU, O.D.?

Quality data not reported

NPI registry status

Active

Issued 09/29/2005

NPI 1275520975

Primary specialty

Optometrist

High-volume

60,463 US NPIs in this specialty

Medicare Part D claims

228 11% vs specialty avg

2023 prescription claims

Specialty avg: 257

Specialty distribution in Maine

How Optometrist compares to other specialties among Maine providers

Maine providers

Optometrist share within Maine

1. Optometrist42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Optometrist share within Maine

Specialty board-certification context

Estimated specialty board-certified rate — Optometrist (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Optometrist ABMS/AOA estimate

Est. board-certified rate (Optometrist) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Optometrist) — ABMS / AOA estimate

The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.

Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).

THOMAS NADEAU, O.D. is a Optometrist provider practicing in BOOTHBAY HARBOR, Maine, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: O.D.. NPI: 1275520975. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

THOMAS NADEAU, O.D. appears in the CMS NPPES registry as a Optometrist provider holding O.D. credentials at 145 TOWNSEND AVE, BOOTHBAY HARBOR, ME, 04538, with a listed phone of (207) 633-3035. NPI 1275520975 was issued on 09/29/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what NADEAU most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 228 prescription claims written by this provider, covering 62 Medicare beneficiaries and totaling roughly $35K in drug spend, split 32% brand-name and 68% generic by claim count. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Optometrist is a high-volume specialty nationwide, with 60,463 enrolled providers across 56 states and an average of 257 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

145 TOWNSEND AVE
BOOTHBAY HARBOR, ME 04538

Provider Details

NPI 1275520975
Specialty Optometrist
Credentials O.D.
Gender Male
NPI Issued 09/29/2005

Brand vs generic prescribing mix · Above average

THOMAS NADEAU, O.D. — brand share 32.0%
Specialty average (est.)

32% brand-name claims vs 68% generic, on 228 2023 Medicare Part D claims.

The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

228
Total Claims
$35K
Total Drug Cost
62
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
417
Total Day Supply
11,704
Brand vs Generic
32% brand / 68% generic
Brand Drug Cost
$28K
Generic Drug Cost
$7K

Patient Demographics

Average Patient Age
76.4 years
Avg HCC Risk Score
1.02
Gender Split
61% female / 39% male

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

Drug Claims
Latanoprost
62
Dorzolamide-Timolol
Dorzolamide Hcl/Timolol Maleat
26
Brimonidine Tartrate
20
Timolol Maleate
18

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Optometrist Overview

How THOMAS NADEAU, O.D. fits within the Optometrist landscape nationally.

60,463
Optometrist Providers in US
56
States with Optometrist
257
Avg Claims per Provider

THOMAS NADEAU, O.D.'s 228 claims are below the specialty average of 257.

Nearby Optometrist Providers in Maine

Other clinicians with the same primary specialty enrolled in Maine, drawn from the same CMS NPPES roster as NADEAU.

Compare Optometrist nationally: see state-by-state distribution →

Frequently Asked Questions

What is THOMAS NADEAU, O.D.'s specialty?
THOMAS NADEAU, O.D. specializes in Optometrist and practices in BOOTHBAY HARBOR, Maine. Credentials: O.D..
How much does THOMAS NADEAU, O.D. prescribe under Medicare Part D?
In 2023, THOMAS NADEAU, O.D. wrote 228 Medicare Part D claims totaling $35K in drug costs for 62 beneficiaries.
Where is THOMAS NADEAU, O.D. located?
THOMAS NADEAU, O.D. is located at 145 TOWNSEND AVE, BOOTHBAY HARBOR, ME, 04538. Phone: (207) 633-3035.
What is THOMAS NADEAU, O.D.'s NPI number?
THOMAS NADEAU, O.D.'s National Provider Identifier (NPI) is 1275520975, issued on 09/29/2005.
Does THOMAS NADEAU, O.D. prescribe more brand-name or generic drugs?
THOMAS NADEAU, O.D.'s prescribing is 32% brand-name and 68% generic drugs by claim count, with $28K in brand drug costs.
How many Optometrist providers are there in the US?
There are 60,463 Optometrist providers across 56 states in the US. The average Optometrist provider writes 257 Medicare Part D claims per year.
What drugs does THOMAS NADEAU, O.D. prescribe most often?
Based on 2023 Medicare Part D data, THOMAS NADEAU, O.D.'s most frequently prescribed drugs include Latanoprost, Dorzolamide-Timolol, Brimonidine Tartrate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does THOMAS NADEAU, O.D. accept Medicare?
THOMAS NADEAU, O.D. appears in CMS Medicare data with 228 Part D claims and 62 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify THOMAS NADEAU, O.D.'s credentials?
THOMAS NADEAU, O.D.'s NPI is 1275520975 with credentials O.D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.

Data Sources

Provider Directory
CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
Specialty Classification
NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
Prescribing Data
CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Limitations
Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.

See our complete data methodology for details on how we collect and process government data.

Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).

Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology